Optical sensing mechanisms for input devices
First Claim
Patent Images
1. An input device for an electronic device, comprising:
- a user input surface for receiving a force input, the user input surface movably connected to a substrate and configured to move relative to an enclosure of the electronic device;
at least one light sensor operably connected to one of the user input surface or the substrate; and
a light source in selective communication with the at least one light sensor;
whereinwhen the user input surface is in a first position the at least one light sensor receives a first value of light from the light source;
when the user input surface is in a second position the at least one light sensor receives a second value of light from the light source;
a difference between the first value of light and the second value of light is calculated by a processor operatively connected to the light source;
the calculated difference is correlated to a magnitude of the force input by the processor; and
the magnitude is provided to the electronic device.
1 Assignment
0 Petitions
Accused Products
Abstract
A computer or other electronic device including a processor and an input device, such as a track pad. The track pad being in communication with the processor and including a movable surface, a light source in communication with the processor, and an optical sensor in selective optical communication with the light source and in communication with the processor. The optical sensor detects movement of the movable surface by receiving light from the light source.
116 Citations
32 Claims
-
1. An input device for an electronic device, comprising:
-
a user input surface for receiving a force input, the user input surface movably connected to a substrate and configured to move relative to an enclosure of the electronic device; at least one light sensor operably connected to one of the user input surface or the substrate; and a light source in selective communication with the at least one light sensor;
whereinwhen the user input surface is in a first position the at least one light sensor receives a first value of light from the light source; when the user input surface is in a second position the at least one light sensor receives a second value of light from the light source; a difference between the first value of light and the second value of light is calculated by a processor operatively connected to the light source; the calculated difference is correlated to a magnitude of the force input by the processor; and the magnitude is provided to the electronic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23, 24, 25)
-
-
14. A computer comprising:
-
a processor; and a track pad in communication with the processor, the track pad comprising; a movable surface configured to move relative to an exterior surface of an enclosure of the computer; a light source in communication with the processor; and an optical sensor in selective optical communication with the light source and in communication with the processor;
whereinthe optical sensor receives a first value of light and a second value of light from the light source; the processor calculates a difference between the first value of light and the second value of light corresponding to a displacement of the movable surface; and the processor correlates the difference to a magnitude of force input applied to the movable surface. - View Dependent Claims (15, 16, 17, 26, 27, 28, 29, 30, 31, 32)
-
-
18. A method for measuring a magnitude of force applied to an input device of an electronic device, the method comprising:
-
emitting a light from a light source; detecting, by an optical sensor, a first light value corresponding to a first position of the input device relative to the light source; detecting, by the optical sensor, a second light value corresponding to a second position of the input device relative to the light source; determining, by the optical sensor, a displacement of the input device based on a difference between the first value of light and the second value of light; and determining a magnitude of a force applied to the input device based on the displacement. - View Dependent Claims (19, 20, 21, 22)
-
Specification